[cctalk] Re: Might be antique computer parts

[Paul Koning via cctalk]

> On Oct 1, 2024, at 10:54 AM, Jon Elson via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
>> ...
> The IBM 2314 was REALLY low tech.  There was almost no electronics in the 
> drives!  They has a read amp, a write amp and a hydraulic "stepper motor" 
> with mechanical detents that moved the heads in response to step in and step 
> out pulses from the control unit.
> 
> IBM did know how to distill things down to the absolute minimum. Remember, 
> this was developed in the early 1960s and first shipped with the first 360's 
> in 1965.

I haven't met a 2314, but I did see 2311 drives on a 360/44 and 1311 drives on 
a 1620.  The 1311 is definitely hydraulic -- I learned that when ours sprung a 
leak and sprayed hydraulic fluid all over the system pack.  It got fixed 
perfectly, though.  So that drive technology may be older than 1965.

        paul